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When use Cramer's Rule to solve the system of linear equations x+2y= 4 2x -5y= 10 then the determinant of A, equal : Select one:

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When use Cramer's Rule to solve the system of linear equations x+2y= 4 2x -5y= 10 then the determinant of A, equal : Select one: hs a. -9 b. -40 C. 2

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